Thanks for your questions and comments, virgilcarter. 1. All doors and doorways are handicapped accessible along with bathroom area in parents' wing. 2. No tub on the main level. For parents' shower, we were thinking of having just a small lip so wheelchair could go into shower. Planning on tub/shower combo in lower level once finished so at least there would be a tub in the house. 3. Agree about the dedicated corridor space, however, not sure how to fix. Would like parents' wing a bit separated but not lose too much efficiency with corridors. Any suggestions? 4. Agree about # of doors in MBR and bath area. I could eliminate door from hall into laundry but would then not have access to a laundry without going through a bedroom. Fine by me, but not sure about re-sale. I could also eliminate door going into closet and just have an opening. It seems like there is a better way to configure my bathroom, closet, and laundry area but not sure how to do it. 5. Will try to re-post without dashed lines (which are just there to show room dimensions). Thanks again for your comments, I really appreciate it!

I don't know about first prize, but yours is the tops in my book for originality and nostalgic appeal. I sure do miss ol' Charles Shultz. I think that Christmas special is some of his best work. Your house is an incredibly original rendition, IMHO! I can't think of a more fun way to spend the day, what a great experience--lucky you!

For almost half of my life and half of that half, there was also another family in that first apartment, so we shared with them a hallway, an entry(a pretty big one..old apartment), and kitchen and bath and a restroom. there was a third family there too but they had kinda separate entrance from the hallway. some kids I knew lived in flats with several families. And we had a phone(but shared number. meaning you can talk when your neighbors don't use the phone), and many people didn't, when I was a kid (no, I am not that old yet:) I also know we will live with my MIL at some point..(which we already did, for a year while we were remodeling)..we bought our new house and added to it and all to accommodate this arrangement actually. Otherwise we had no intention to move; but when we knew things changed we had to work towards the new plan. For now we rent an apartment for her, 5 min walk from us(and might buy something smallish close if we're lucky), because independency is a thing to be cherished..but we have a very clear understanding that at some point she'll move in with us. Am I very happy about it? No..she's wonderful of course, I'm not bad myself either lol, but it's hard for many reasons. Yet such is life and that's how it will be

If the separation wall between the units is regulated by a building code you need to tell us where the project is located and what code applies. Insulation (fiber or foam) will do very little to reduce direct sound transfer between the units but it will help if there are penetration in the wall for electrical outlet, etc. and it can't hurt. A better sound separation treatment is horizontal resilient metal channels supporting a second layer of drywall on one side of the wall.